Надо перевести на third conditional
1.We missed the train because we didn't hurry
2.I went to the library because I needed that book
3.We were not invited to Ann's birthday party. We went to the cinema now
4.I didn't have an extra ticket to the theatre last night and i couldn't invite you.
5.I didn't see the new film last week. I couldn't jain your discussion

1. We wouldn't have missed the train if we had hurried.2. I wouldn't have gone to the library if I hadn't needed that book.3. If we had been invited to Ann's birthday party, we wouldn't have gone to the cinema.4. If I hadn't had an extra ticket to the theatre last night, I couldn't have invited you.5. If I hadn't seen the new film last week, I couldn't have joined your discussion.